Bird feeder



FIG. 1 is a front perspective view of a bird feeder showing my new design;

FIG. 2 is a left side elevational view thereof, the right side elevational view being identical;

FIG. 3 is a front elevational view thereof, the rear elevation view being identical;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines in FIG. 1 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a bird feeder, as shown and described. 